Free Scientific Calculator

The Scientific Calculator is a free online tool with advanced mathematical functions including trigonometry, logarithms, exponents, and scientific notation.

Yes, it is completely free with no registration required. All calculations happen client-side in your browser.

The Scientific Calculator supports trigonometric functions, logarithms, exponents, factorials, square roots, and other advanced mathematical operations.

Absolutely. The Scientific Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Scientific Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Scientific Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Scientific Calculator uses industry-standard formulas and algorithms to ensure accurate results. However, for critical financial or medical decisions, always consult a qualified professional.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Scientific Calculator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Degrees, radians, and gradians are three ways to measure the same angle, and choosing the wrong one is the most common cause of wrong trig answers. A full circle is 360 degrees, 2π (about 6.283) radians, or 400 gradians, so a right angle is 90 degrees, π/2 radians, or 100 gradians. Degrees are standard for geometry and everyday problems, radians are required for calculus and most physics because they make derivatives of sine and cosine clean, and gradians appear mainly in surveying. If you compute sin(90) expecting 1 but the calculator is in radians, you get about 0.894 instead. This calculator has an angle toggle so you can switch units before evaluating any trig or inverse-trig function. Set the mode that matches your problem first, then enter the function.

Factorials grow astonishingly fast, and standard computers store numbers in double-precision floating-point format, which can only represent values up to roughly 1.8 × 10³⁰⁸. The factorial of 170 is about 7.3 × 10³¹², which still fits, but 171! exceeds that ceiling, so the result overflows and the display shows Infinity. This is not a bug; it is the same limit spreadsheets and most programming languages hit, because they use the same number format. For exact values beyond 170! you would need arbitrary-precision software designed for big integers. For permutations and combinations, the underlying factorials may overflow even when the final answer is small, so very large nPr or nCr inputs can also return Infinity. This calculator computes factorials exactly up to 170!, which covers nearly all practical homework and probability work.

Both write very large or very small numbers as a coefficient times a power of ten, but they differ in how the exponent is chosen. In scientific notation the coefficient is always between 1 and 10, so Avogadro's number appears as 6.022 × 10²³. In engineering notation the exponent is restricted to multiples of three, which lines the value up with metric prefixes like kilo (10³), mega (10⁶), milli (10⁻³), and micro (10⁻⁶); the same number becomes 602.2 × 10²¹. Engineers prefer the engineering form because the exponent maps directly onto unit prefixes, making 47,000 ohms read naturally as 47 × 10³, or 47 kΩ. This calculator lets you switch the display between normal, scientific, and engineering notation, and it automatically falls back to exponential form for very large or very small magnitudes so results stay readable.

They are all logarithms but use different bases, and the base determines what question the function answers. Log (written log₁₀) uses base 10, so log(1000) equals 3 because 10 to the third power is 1000; it is handy for orders of magnitude, decibels, and pH. Ln is the natural logarithm with base e (about 2.718), and it appears throughout calculus, growth and decay models, and continuous compounding because the derivative of ln(x) is simply 1/x. Log₂ uses base 2 and is central to computer science and information theory, since log₂(8) equals 3 reflects three binary doublings. You can convert between any bases using log_b(x) = ln(x) / ln(b). This calculator offers log, ln, log₂, and a general base-n logarithm, so pick the base your problem requires and enter the value directly.

Both count how many ways you can choose r items from a set of n, but permutations care about order while combinations do not. Use nPr when arrangement matters, such as ranking finishers in a race or filling distinct offices: nPr = n! / (n − r)!, so the number of ways to award gold, silver, and bronze among 8 runners is 8P3 = 336. Use nCr when order is irrelevant, such as dealing a hand of cards or picking a committee: nCr = n! / (r! × (n − r)!), so choosing 3 runners from 8 to form a team is 8C3 = 56. Because every combination corresponds to r! orderings, nPr is always r! times larger than nCr. This calculator includes dedicated nPr and nCr buttons, so enter n, choose the operation, then enter r to get the count instantly.